Seenda’s Power Magic is an external iPhone battery, hands free kit, and FM transmitter all in one

Here’s something you don’t see every day. The Seenda Power Magic, a versatile battery pack that doubles as both an FM transmitter and a hands-free car kit. It fits in your pocket and increases your iPhone 4’s standby time by additional 200 hours while sporting awesome features missing from many branded accessories.

Although it works with other cellphones and gadgets, the device is designed specifically with Apple’s gear in mind. In addition to providing juice to any iPhone or iPod model (except first-gen devices) via its 30-pin connector, it powers other mobile devices through a 5V-1.0A USB interface as well. The internal 1250mAh battery gives you 200 hours of standby time when you’re out in the field. When it runs out of juice, plug the pack into either a car charger using the included cable, or a computer/USB charger via a built-in mini USB 5V-0.5A port.

Hit the iPhonesque home button and the four LED lights will tell you the battery charge. Plug the pack into a wall socket and it’ll power your iPhone from the primary electric source and thus preserve its battery that has a limited number of charge cycles. Another nice-to-have: The pack’s 30-pin dock connector is protected by a cap while a little door pops open to reveal two USB ports when needed.

The pack also doubles as an FM transmitter that outputs audio from your mobile device to an FM radio (3-9 meters range) using the 88.1-107.9Mh frequency band – perfect for in-car radios. Just plug it into your device’s 3.5 millimeter audio output and hold the pack’s home button for three seconds in order to switch to FM mode. The current frequency indicated on the LCD screen can be set in 0.1MHz increments using the round up and down buttons on the pack’s profile.

You only need to manually tune in your car radio to this frequency or let it automatically scan all the available channels. The battery in FM mode provides 30 hours of continuous music playback. Thanks to a built-in microphone, if there’s an incoming call while you’re listening to some music in FM mode, the pack pauses music playback and routes the caller to the car radio while picking up your voice via its built-in mic. Unfortunately, this hands-free feature is only available in FM mode.

The Power Magic includes the device itself, a mini USB cable for charging, in addition to a car charger and instruction manual. It’ll be available in six colors (black, white, lemon green, blue, pink, and yellow). Price and availability was unknown at press time.